High-speed, Flat-bed, Top and Bottom Coverstitch Machine MF-7722(2-needle, top and bottom coverstitch machine) MF-7723 (3-needle, top and bottom coverstitch machine)   MF-7723U10B56 DEBUT! The MF-7700 series state-of-the-art machine that has been designed through a thorough ongoing study of seam quality MF-7723U10B56 MF-7723C10B56 Since the seam tension may be easily increased or decreased, the machine can be used for a broader range of applications Seams can be adjusted depending on the application or material by changing the thread path or adjusting the thread tension controller, to produce soft and low-tensed seams for inner wear or to produce high-grade well-tensed seams for outer wear.       Optimization of the thread take-up mechanism and top covering thread path route The optimized thread take-up mechanism and top covering thread path route contribute to an increased stability of top covering stitches. In addition, the machine is capable of performing sewing with a low tension applied to the thread to offer improved responsiveness to the sewing thread. The machine comes with a variety of features to increase applicable types of sewing products The machine is provided as standard with a great diversity of features, such as a differential-feed adjustment mechanism with a micro-adjustment mechanism, a feed dog inclination adjustment mechanism, a micro-lifter and a needle bar stroke conversion mechanism. The machine can therefore be quickly adjusted to respond to various materials and processes, thus increasing the applicable types of sewing products.           Differential-feed micro- adjustment mechanism The differential-feed amount can be easily adjusted to the best suited value for the material to be used. Since the front and rear feed dogs are synchronized, the differential- feed ratio is constant, requiring no additional adjustment, even when the stitch length is changed. Feed dog inclination adjustment mechanism Adjustment of the feed dog inclination can be carried out from outside with ease. The feed dog inclination adjustment mechanism works effectively to secure the material being sewn in place with increased reliability and thereby preventing uneven material feed and puckering. Micro-lifer The micro-lifter keeps the presser foot in a slightly raised position during sewing to help prevent problems such as slippage and deformation, or damages that can easily occur when sewing elastic materials. Looper thread twining prevention mechanism The looper thread cam comes provided with a thread twining prevention mechanism. Even if the thread twines around the looper thread cam, the cam can be easily detached for removal of the thread. The machine operates with reduced vibration and noise, promising comfortable sewing. The well-balanced design of the machine achieves low-vibration and low-noise operation even under the high-speed mode. This enables the operator to concentrate on sewing work in a more comfortable environment. Commercially available gauge components can be used with no additional work. The machine is designed to use gauge components which are similar to commercially available ones. This means that gauge components for the machine are readily available and can be replaced with little or no difficulty.